Nut-lock.



I. N. ANDERSON.

' NUT LOOK.

APPLICATION FILED JAN. 23, 1909.

Patented July 20, 1909.

Nrrnn STATES PATENT OFFICE.

INGAR N. ANDERSON, OF RAOINE, WISCONSIN, ASSIGNOR OF ONE-HALF TOFERDINAND J.

- JOHNSON, OF RAOINE, WISCONSIN.

NUT-LOCK.

Specification of Letters Patent.

Patented July 20, 1909.

To all whom it may concern:

Be it known that I, INGAR N. ANDERSON, a citizen of the United States,and resident of Racine, in the county of Racine and State of Wisconsin,have invented certain new and useful Improvements in Nut-Locks; and I dohereby declare that the following is a full, clear, and exactdescription thereof.

The object of my invention is to provide simple, durable and effectivenut-locks, to be utilized in various structures subject to vibrations,the invention consisting in certain peculiarities of construction andcombination of parts as hereinafter fully described with reference tothe accompanying drawings and subsequently claimed.

In .the drawings: Figure 1 represents a sectional elevation of anut-lock embodying the features of my invention, which nut-lock is shownapplied to a bolt and nut employed to secure an angle-iron and flatmember together, the section being indicated by line 11 of Fig.2; Fig.2, a front elevation of the same, and Fig. 3, a detached view of thelocking member in the position it assumes when not in use, which lockingmember as shown consists primarily of a dished Washer and may in someinstances be provided with a foot.

Referring by numerals to the drawings, 1 indicates a threaded boltprovided with the usual nut 2. The bolt is fitted through apertures in ametallic member 3 and an angleiron section 4, and between the outer faceof which section and the nut is fitted an apertured rectangularspring-washer 5. The bottom edge 6 of the washer lies parallel with thelower flange of the angle-iron section, which flange prevents saidwasher from rotating.

In instances where members are'secured having no flanges, the bottomedge 6 of the washer, as shown in Fig. 3, may be provided with aright-angle foot, which foot is adapted to overlap the edge of theadjacent member, as indicated by dotted lines, the foot in this caseserving to prevent said washer from turning when opposed by the nut. Thetop edge of the washer is preferably arch-shaped and is bent over toform an overhanging lip 7, which lip projects into the path of travel ofthe corners of the nut, when the latter is in its seated position, andthereby locks said nut against turning.

As shown in Fig. 3, when the springwasher'is not subjected to strain, itis bowed outwardly from top to bottom in such manner that only its upperand lower edges will touch a flat surface. In this position it will beobserved that the overhanging hp 7 extends out approximately at aright-angle to a vertical line which would contact with the top andbottom edges of the washer. Consequently when the nut is run upon thethreaded shank of the bolt, its corners will pass freely under the lip,until such time as the washer has been compressed sufiiciently to causesaid lip to draw downward. The corners of the nut will then engage thearchshaped edge of the lip at each turn and spring the same upwardly,the force required to spring said lip being proportionately increasedwith each revolution of said nut until such time as the washer isflattened, it being understood that the angle of the aforesaid lip isconstantly changing so as to bring the edges of the latter closer to theface of the nut, which action is due to the flattening out of thebowedbody-portion of the washer.

I claim:

The combination of a bolt and its nut, a washer fitted under the nut,the washer comrising a normally bowed body-portion, and liaving anormally recurved lip extending from one of the edges of the bowedportion, the lip being provided with an arch-shaped edge, the centralortion of which archshaped edge is broug it into the path of travel ofthe nut corners as said nut is run upon the bolt to cause a flatteningof the washer upon the resisting surface to provide for effecting alocking engagement of said central portion of the washer-edge with aface of the nut, and means in connection with one edge of the washer,whereby the latter is held against rotation.

In testimony that I claim the foregoing I have hereunto set my hand atRacine, in the county of Racine and State of Wisconsin in the presenceof two witnesses- INGAR N. ANDERSON.

Witnesses M. WILSON MILLY, J. E. RowLANns.

